510 Area Code

The CPUC will begin the process to introduce a
new area code to the area now served by the 510 area code, as the 510 is
expected to use up its available prefixes by June 2019. The
telecommunications service providers have proposed to introduce the new area
code through the overlay method. Adding a new area code to the area now
served by the 510 area code will provide additional prefixes and new telephone
numbers for the 510 customers. The proposed overlay, pending CPUC
approval, will allow all customers to keep their current phone numbers,
including their area code.Customers will not be required to
change their phone numbers or their area code. To avoid service disruption, the new area code will be added to the 510 area code by December 2017, six months before depletion of prefixes. In December 2017, customers requesting new phone numbers in the 510 geographic area may be assigned a new area code.

The area served by the 510 area code includes the
western portions of Alameda and Contra Costa Counties. The 510 area code serves
the cities of Alameda, Albany, Berkeley, Emeryville, Fremont, Hayward, Newark,
Oakland, Piedmont, San Leandro and Union City in Alameda County; and the cities
of El Cerrito, Hercules, Pinole, Richmond, and San Pablo in Contra Costa County.

The CPUC will be holding local jurisdiction and
public meetings on January 17 and February 15, 2017, to inform the local
jurisdictions and the public, and to hear concerns about adding a new area code
to the 510 area code.

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